Malicious PDF — malware analysis report

Static analysis result for SHA-256 942cab6e35cfaf29…

MALICIOUS

PDF

34.1 KB Created: 2021-06-28 17:13:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6c15b92ebaf4ced331507c3e0bdca4ef SHA-1: 86fd6f08dc49ae4569ad81e44548db441b3ce0c5 SHA-256: 942cab6e35cfaf2904d3b5a242f8acfa9681247f6edeb71643e13ab0e2a4b457
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, including a primary redirector at http://netcdn.co/app/431946152/robux-4all-cool-hack-game-hack, which is flagged as malicious. The document body and heuristics indicate a lure for game-related cheats and currency, aiming to direct users to potentially harmful content or downloads. The presence of many linked PDFs suggests a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/robux-4all-cool-hack-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-royale-high-diamond-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-how-to-get-elite-game-pass-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/counter-blox-roblox-offensive-free-skins-download_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-de-roblox-para-atravesar-cosas_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/wall-hack-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/walking-though-hack-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-neon-district-terrian-dowload-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/cheats-and-codes-for-roblox-on-pc_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDD 22048 bytes
SHA-256: 6e03b5a73a16097629478161602e678e3ff85f8e2c58683780a45bcfb2fa0c11
font_01_sfnt_off000060c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C9 18860 bytes
SHA-256: a0a9209c8f18e821da015e0c22e3983e9616b4a3e3fa43516adcf0ed814d7479

Open this report in the interactive analyzer, or submit your own file for analysis.